Two new events are added (Ppp and Pps) which define the Progressing and
Stalled states respectively. A new pseudo-state Idle is shown in the
view when no thread is running.
In Mac OS, the top menu bar is placed above any window, causing the
timelines being opened at (0,0) appear under it in such a way that the
timeline title bar is not reachable by the mouse, making it hard to
move.
This simple solution opens the windows a bit away from the top left
corner, at (100,100).
Fixes: https://pm.bsc.es/gitlab/rarias/ovni/-/issues/180
